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MAX5019 - Current-Mode PWM Controllers with Integrated Startup Circuit

General Description

The MAX5019/MAX5020 integrate all the building blocks necessary for implementing DC-DC fixed-frequency power supplies.

Either primary- or secondaryside regulation may be used to implement isolated or nonisolated power supplies.

Key Features

  • o Wide Input Range: (18V to 110V) or (13V to 36V) o Isolated (without optocoupler) or Nonisolated Power Supply o Current-Mode Control o Leading-Edge Blanking o Internally Trimmed 275kHz ±10% Oscillator o Low External Component Count o Soft-Start o High-Voltage Startup Circuit o Pulse-by-Pulse Current Limiting o Thermal Shutdown o SO-8 Package MAX5019/MAX5020 Ordering Information PART MAX5019CSA.
  • MAX5019ESA.
  • MAX5020CSA.
  • MAX5020ESA.
  • TEMP. RANGE 0°C to +70°C -40°C to +85°C 0°C to.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-2115; Rev 0; 7/01 Current-Mode PWM Controllers with Integrated Startup Circuit General Description The MAX5019/MAX5020 integrate all the building blocks necessary for implementing DC-DC fixed-frequency power supplies. Either primary- or secondaryside regulation may be used to implement isolated or nonisolated power supplies. These devices are currentmode controllers with an integrated high-voltage startup circuit suitable for telecom/industrial voltage range power supplies. Current-mode control with leadingedge blanking simplifies control-loop design and internal ramp compensation circuitry stabilizes the current loop when operating at duty cycles above 50% (MAX5019).